msem-instigator

Target player sacrifices a creature. Create a tapped 2/2 black Zombie creature token.

Whenever another nonland creature you control dies, return it to the battlefield tapped with a sapling counter on it. It becomes an Animus land named Bitter Hazel, loses all other card types, and gains “{T}: Add {G}” and “Pay this card's mana cost: This land becomes a creature until end of turn. It's still a land.”

Flash
Slipstream (This creature can't be blocked as long as only creatures with slipstream are attacking.)
When Grim enters, if you sacrificed a permanent this turn, exile target tapped creature.

Whenever Grin, Scourge of Goresand attacks, when you next cast an instant or sorcery spell with mana value 3 or less this turn, copy that spell. You may choose new targets for the copy.
Dash {2}{R} (You may cast this spell for its dash cost. If you do, it gains haste, and it's returned from the battlefield to its owner's hand at the beginning of the next end step.)

Sacrifice another creature: Grindlesnap gets +3/+2 and gains trample until end of turn if that creature was a Crocodile. Otherwise, it gets +1/+1 until end of turn.
Whenever Grindlesnap is dealt combat damage, create a 3/2 green Crocodile creature token with trample.

Rapport — Whenever Grinning Fox and at least one other creature you control become tapped, tap another target creature. That creature doesn't untap during its controller's next untap step.

Deception {2}{B} ({2}{B}, Return an unblocked attacker you control to hand: Put this card onto the battlefield from your hand tapped and attacking.)
Whenever Grinning Torturer deals combat damage to a player, torment that player. (They lose 3 life unless they discard a card or sacrifice a nonland permanent.)

Put target creature on top of its owner's library.

Enchant opponent
When Grisly Hunger enters, enchanted player's life total becomes 10.
At the beginning of enchanted player's end step, they sacrifice a creature. If they do, they lose life equal to that creature's power.

When Grisly Reaper enters, you may exile a creature card from your graveyard. When you do, create a 1/1 black Skeleton creature token.

Choose two —
• Target player sacrifices a creature.
• Grixis Command deals 3 damage to target player or planeswalker and you gain 3 life.
• Return target spell to its owner's hand.
• Return target monocolored instant or sorcery card from your graveyard to your hand.

Deathtouch
Islandcycling {1}, mountaincycling {1} ({1}, Discard this card: Search your libary for an Island or Mountain card, reveal it, put it into your hand, then shuffle.)

Renown 1 (When this creature deals combat damage to a player, if it isn't renowned, put a +1/+1 counter on it and it becomes renowned.)
When Grizzled Captain becomes renowned, create two 1/1 white Soldier creature tokens.

Lifelink
When Grizzled Warpriest enters, starting with you, each player may gain 3 life. For each opponent that does, create a Treasure token.

{4}{G}{G}: Monstrosity 4. (If this creature isn't monstrous, put four +1/+1 counters on it and it becomes monstrous.)
When Grizzly Matriarch becomes monstrous, destroy target noncreature permanent an opponent controls.

[+2]: Destroy up to one target noncreature permanent.
[0]: Grohl becomes a legendary green 6/6 Elk Giant creature with trample, hexproof, and haste until your next turn.
[–9]: For each permanent you control, create a token that's a copy of it.

Archive 6
Grohl's Study's power and toughness are each equal to the number of cards in the archived library.
Whenever Grohl's Study deals combat damage to a player, you may put a card from the archived library into your hand.

Golden age (If you cast an instant or sorcery spell, activated a nonmana ability, and attacked this turn, enter a renaissance for this game.)
Sacrifice another creature: Grotesque Defiler gains flying until end of turn.
Whenever Grotesque Defiler deals combat damage to a player, if you're in a renaissance, that player discards a card.

Flash
This spell costs {1} less to cast for each creature that left the battlefield this turn.

Menagerie — When Grotto Guardian enters, if there are five or more creature types among creatures you control, target creature you don't control gets -2/-2 until end of turn.

When Grotto Scarab enters, create two 1/1 green Insect creature tokens for each creature you controlled that died this turn.

Destroy target tapped creature.
Orchestrate {W} (You may exile this card from your hand anytime you could cast a sorcery for its orchestrate cost. When you next resolve a spell, you may cast this from exile without paying its mana cost.)

Target creature +3/+3 and gains trample until end of turn.
Leitmotif (If you cast this spell from your hand, exile it as it resolves. When you next cast a spell that shares a color with this card, you may cast this from exile without paying its mana cost.)

For each counter on each permanent you control, you may put another counter of that kind on that permanent.
Draw a card.

When Growth Paradigm enters, conjure a card named Data-Point into your hand. (It's a sorcery that costs {2} with “Draw a card.”)
Once each turn, when you cast a sorcery spell, you may create an X/X green Mutant creature token, where X is that spell's mana value.